External wall system of cast-in-situ prefabricated dismantling-free integral assembling heat-preservation external formwork and construction method

Abstract

The invention relates to an external wall system of a cast-in-situ prefabricated dismantling-free integral assembling heat-preservation external formwork and a construction method.The external wall system comprises an internal formwork, a prefabricated integral assembling heat-preservation external formwork formed by splicing prefabricated external wall composite heat-preservation formwork single bodies and wall body rebars; a cast-in-situ shear wall is formed by conducting cast-in-situ by taking the prefabricated integral assembling heat-preservation external formwork and the internal formwork as supports; the prefabricated integral assembling heat-preservation external formwork is fixedly mounted on a prefabricated external wall heat-preservation external formwork frame, the prefabricated external wall heat-preservation external formwork frame and the prefabricated integral assembling heat-preservation external formwork are integrally hoisted on the outer sides of the wall body rebars and correspond to the internal formwork on the inner sides of the wall body rebars, and an opposite-pull bolt assembly which transversely penetrates through the wall body rebars, the prefabricated external wall heat-preservation external formwork frame and the internal formwork is arranged in the wall body rebars.Compared with the prior art, integral prefabricating hoisting is adopted, and secondary construction of the heat-preservation layer is omitted; a heat-preservation layer and the main body structure are integral and same in service life, and the durability of the heat-preservation layer is increased; the building wall heat-preservation performance can be improved, and the construction quality is improved; by means of the system, construction of the external formwork and an external scaffold can be omitted and the construction efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of exterior walls of buildings, and in particular relates to an exterior wall system and a construction method of an exterior wall system and a construction method for integrally assembling a heat-insulating exterior formwork integrated with concrete pouring and prefabricated without disassembly. Background technique [0002] Enforcement of building energy efficiency standards and strict control of construction waste and construction noise by urban management. [0003] In the traditional shear wall construction, after the steel bars are bound, the workers install the external and internal templates and support systems on the scaffolding platform and the floor respectively, and the internal and external templates are internally supported (generally fixed on the reinforcement cage with steel bars of equal length to the wall thickness) ) and the paired bolts or the paired flat irons form a concrete pouring cavi...

AI Technical Summary

Problems solved by technology

However, during implementation, the strength of the precast concrete exterior wall formwork and insulation layer alone cannot bear the self-weight of the poured concrete and the lateral pressure on the formwork during vibration. In addition, after pouring and forming in time, from the durability and firmness test, the insulation layer basically bears the weight of its own weight and the weight of the precast concrete exterior wall formwork, and then causes it to fall off; the main reason is that the insulation layer and the wall concrete are directly poured into shape. Under the action of large tension, the thermal insulation layer is variable, resulting in hollowing at the joint with the wall concrete; the bonding between the two material thermal insulation layers and the concrete does not fit well, and its bonding force is relatively poor, which cannot be achieved at all. The expected purpose, and then the implementation of this technology cannot be implemented and promoted. Similarly, this problem also exists at the junction of the precast concrete exterior wall formwork and the insulation layer

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